Update Obs4MIPs datasets names (ESGF) in ECS recipes

[rbeucher]

Description

Following discussion here #2974

CERES-EBAF Ed2-7 is not available on ESGF anymore.
CERES-EBAF Ed2-8 is available for variable rlut, rlutcs, rsdt, rsut, rsutcs.
This PR removes the version facet for CERES-EBAF which fix automatic download from ESGF.

recipe_ecs_constraints.yml
AIRS RetStd-v5 ['hus'] >> AIRS-2-1
AIRS-2-0 v2 ['hur'] >> AIRS-2-0
CERES-EBAF Ed2-7 ['rsdt', 'rsut', 'rsutcs'] >> CERES-EBAF
GPCP-SG v2.2 ['pr'] >> GPCP-V2.2

recipe_ecs_scatter.yml
AIRS RetStd-v5 ['hus', 'husStderr'] >> AIRS-2-1
CERES-EBAF Ed2-7 ['rsdt', 'rsut', 'rsutcs'] >> CERES-EBAF
TRMM-L3 7A ['pr', 'prStderr'] >> TRMM

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[bouweandela]

In recipe_ecs_scatter.yml, the reference_datasets still need to be updated to use TRMM.

[bouweandela]

Thanks for the updates! Could you please merge the main branch from this GitHub git repository into your branch? That should solve the failing tests. For example, if you have added this repository under the name upstream, you can do this by running the command git pull upstream main.

[rbeucher]

Sorry, I forgot to update our main branch

Comments have been addressed.